Hon Hai Precision Industry Co., Ltd.

Hong-Fu Jin Precision Industry (Shenzhen) Co., Ltd.

Xing-Bing Zou

Yong-Jian Chen

A hinge assembly () includes a shell (), a coil spring (), a shaft (), and two bolts (). The shell defines a cavity () therein, with one end of the shell being closed and the other end being open. Two holes () are defined in the shell near the open end. The shaft includes a cam (), a soleplate (), and an interconnecting neck (). The cam includes a cam surface () at one end thereof, the cam surface including peaks and valleys. The spring and the shaft are received in the shell, but with the soleplate exposed outside. The spring biases the cam surface against the bolts no matter what part of the cam surface abuts the bolts. Because the hinge assembly of the present invention is effectively an integrated, modular structure, it is easily incorporated into a portable foldable device such as a mobile phone.

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Shenzhen, China

Xing-Bing Zou